diehl



(No Model.)

P. DIEHL.

BLETRIG INCANDBSCENT LAMP.

,125. Patented Peb. 13,1883.y

the light, tbeshalnl: is verticalb shiftedfln the lduction-coilis exposed to the entireindneien` er by the change of polarity of thepplo5pieees. or by the varietioiisjn strength otfthe'mn ihe seme, as shown in Figs. 2 and 4l, respectively. In the former case the core of the inof 'the pole-pieces of the exterior electra-mag net, so that the'light-giving part; G is heute-rl. te in'eandescence by the eurrentindueedlinlhe interior evil, C, while in the other ease the light is'extinguished as the ore of the induetion-coil O is brought int'o the nenti-al points of-the magneticleld betweemthe pole-piecesl D'iso that. consequently no induction can take place. If it be desired to increase or decrease pole-pieces, whereby a. greater or smalier portion of the indnctiunenil is exposed to the inducing action of theprimaryelectro-magnet. In this manner, without a separate switelx'- ing devine or other equivalent appliances'fthe lamp may be `thrown into action eri extin-l vgnishe'd-'o'iits lghfrgiving power regulated; or Ithe lamp` may be entirely removed and replaecd from the supporting polepieeisz The interiorof the globe and shank is evaenated in the usual manner, so ae to secure the longer duration of fheligfht-givingr;` part there in, which latter may be of any suitable material end, constructionl The induction-currents by which' the iight is produced intbis lamp ere obtained by the magnetic action of the polepiwees of the exterior elee'trn .nagnet upon the interior induetion-coil. The-p ole-pieoes of the exterormag; net are excited either by alternating cnr rents, vghieh are passed through the oeils of the exten-i r magnet., or by a current el nn form dir tion, but ot' alternately illes-easing or decreasing strength. In both cnam'whethnatio ield between the pole-pieces, electric:

currents are induced in the interior el of part., e cylindrical shank made integral therev with, an interior coil arranged in the shank.

and piaeeilin circuit with thelighbgiving part, 'and an exterior electro-magnet arrange-din in-s due-tive relation to the interior coil, and pro vided with enlarged polepieces that form e socketI or holder for the lmnpubstntinlly ns speniiier 2. In sin incandescent lmnp, the com binatien of e globe containing the light-.giving part, a

cylindrical shank made integral therewithi an in circuit with the light-giviug part, and an ex- 'interinr coil nrrnnged'ih the shank and' placed I terior electro-magnet arranged in inductive relesion to the interior, and provided with enlerged polebieces, between which thelalnp may be vertically or axially adj usted, so as to regnlete the light or extinguish the same, substrin-v tisllf; es set forth 3. In an incandescent lamp, e globo contain ing the iight-giving parl:v ahd having nu extension or shank Amede integral therewith, said lmnp having o'eontrantion atthe point of con-l neetiun with the shank and the shank an in-"g wardlyprqiecting bottom, soins to ret-ein the interior coil in position in the shank, snbstnrb4 tizllly ne se?. forth.

1n testimony that; I claim the foregoing' es my invention I have signed my neme in pres ence of two subscribing lWitnesses.

PHILIP Dinan.'

Witnesses: l

PAUL GOEPEL, SARL KAR?. I. 

